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good info. there's your problem right there, brown is very bad. get some h2o2 (hydrogen peroxide) to treat that. Also some rooting complex and enzymes will help but are optional. you need more oxygen in your water, otherwise this won't work out. what's the res temp? perhaps more pumps, idk.

the other way around I believe. But still I don't think soil is easier than hydro. But you need to do quite a bit of research before to get on top of things. and also to have some good environmental conditions, especially temps.

do your roots go below? what's the size of your cube? if it's small they should be out of it by now. tell us a bit more about your grow, the setup and how it's going, it's kinda shooting in the dark now.

cool. an o-scrog :) looks like it will take a while to cover that up!

well that depends on the size of the plant. you could grow just one supermassive monster plant, or dozens of really small ones, it's really up to you. a 400w hps is said to efficiently cover an *area* of roughly 3X3 feet (perhaps a bit less than that).

oh i see so you're already growing in rockwool. i thought that was hydroton. well listen, i could be wrong on this but if you're in dwc and your res is under the rw, it shouldn't really matter the size of the cube, because your roots will be soaked in the res anyway. no?

i can't tell you for sure, but i would think that if you're running a couple of airstones and water temp below 75, you should be fine even with the res full. how do your roots look like? got any ugly stuff growing inside the res? if so, try using some h2o2. but anyway, i don't think your...

once you find a formula that works seed/clone to finish, this won't happen again. it can take a while, and it can be tough, but it's definitely doable, you're on your way there right now. why do you want to grow in rockwool? i'm not sure it's the best medium to grow. do you not like your DWC...

the nutes i use buffer the solution and keep it low at 6.0 max with 1.0 ec. a good chance that with higher EC you will have an easier time with pH. it's a pain i know, you really gotta watch over it, and try to look for ways to keep it down. i really don't know others but would love to hear...

your water is very soft, this is probably the reason for the mag def. that, or your pH, or combined. feed your plant at low dosage, 300-400 EC and put some epsom or calmag in it too, with 7.0 till you get your soil back to 6.5. 3ml/l of biogrow is too much and might burn your plant when using...

most devices give ec at micro siemens, so a value of 80 is actually 0.08 in that chart.

i still think you need the epsom salt! what about your pH now? also, did you actually mean your ec is 0.04? cuz that's very low. but you probably confused it with 0.4, which is the actual value, right?

that's very very little, of a medium-aged RO machine with no nutes that's no nutes at all

well i can't tell you for sure but there's the cation exchange thing and other stuff. i'm not sure how exactly related but anyway chemical properties of mediums etc. so when i was growing seeds in coco, i didn't give any nutes and they just stayed in retard mode until i gave them some food...

i don't really know the brands, they say that rhizotonic is really good... and per manufacturer's instructions, usually start with 2ml/l, build up to 5, every watering or other watering. no proof it actually works so far, but people do use it.

what's this ron paul about? is he pro-legal?

dutch. according to g. translate it says fertilizers. 'mest' means manure in dutch.

i don't think so, algae doesn't really cause problems, it's just a harmless symptom of other problems, aka too wet. rockwool is problematic that way. but i don't think your problem is moisture related.

hermicide should be a criminal offence imo. it's just plain wrong. unless you're growing to sell - nothing wrong with some seeds in your grow! especially since it's 3 plants, you'll be losing much more chopping them than you would by allowing seeds. my advice: keep plucking those sacks, and...

cool. you mentioned at some point that you were disappointed by the v-scrog. can you elaborate? do you think a normal scrog is better now?